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<h1>USB-CDC.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">  FreeRTOS.org V4.6.0 - Copyright (C) 2003-2007 Richard Barry.</span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment">  This file is part of the FreeRTOS.org distribution.</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment">  FreeRTOS.org is free software; you can redistribute it and/or modify</span>
<a name="l00007"></a>00007 <span class="comment">  it under the terms of the GNU General Public License as published by</span>
<a name="l00008"></a>00008 <span class="comment">  the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00009"></a>00009 <span class="comment">  (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment">  FreeRTOS.org is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00014"></a>00014 <span class="comment">  GNU General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">  You should have received a copy of the GNU General Public License</span>
<a name="l00017"></a>00017 <span class="comment">  along with FreeRTOS.org; if not, write to the Free Software</span>
<a name="l00018"></a>00018 <span class="comment">  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment">  A special exception to the GPL can be applied should you wish to distribute</span>
<a name="l00021"></a>00021 <span class="comment">  a combined work that includes FreeRTOS.org, without being obliged to provide</span>
<a name="l00022"></a>00022 <span class="comment">  the source code for any proprietary components.  See the licensing section</span>
<a name="l00023"></a>00023 <span class="comment">  of http://www.FreeRTOS.org for full details of how and when the exception</span>
<a name="l00024"></a>00024 <span class="comment">  can be applied.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">  ***************************************************************************</span>
<a name="l00027"></a>00027 <span class="comment">  See http://www.FreeRTOS.org for documentation, latest information, license</span>
<a name="l00028"></a>00028 <span class="comment">  and contact details.  Please ensure to read the configuration and relevant</span>
<a name="l00029"></a>00029 <span class="comment">  port sections of the online documentation.</span>
<a name="l00030"></a>00030 <span class="comment"></span>
<a name="l00031"></a>00031 <span class="comment">  Also see http://www.SafeRTOS.com for an IEC 61508 compliant version along</span>
<a name="l00032"></a>00032 <span class="comment">  with commercial development and support options.</span>
<a name="l00033"></a>00033 <span class="comment">  ***************************************************************************</span>
<a name="l00034"></a>00034 <span class="comment">*/</span>
<a name="l00035"></a>00035 
<a name="l00036"></a>00036 <span class="comment">/*</span>
<a name="l00037"></a>00037 <span class="comment">  USB Communications Device Class driver.</span>
<a name="l00038"></a>00038 <span class="comment">  Implements task vUSBCDCTask and provides an Abstract Control Model serial </span>
<a name="l00039"></a>00039 <span class="comment">  interface.  Control is through endpoint 0, device-to-host notification is </span>
<a name="l00040"></a>00040 <span class="comment">  provided by interrupt-in endpoint 3, and raw data is transferred through </span>
<a name="l00041"></a>00041 <span class="comment">  bulk endpoints 1 and 2.</span>
<a name="l00042"></a>00042 <span class="comment"></span>
<a name="l00043"></a>00043 <span class="comment">  - developed from original FreeRTOS HID example by Scott Miller</span>
<a name="l00044"></a>00044 <span class="comment">  - modified to support 3.2 GCC by najay</span>
<a name="l00045"></a>00045 <span class="comment">*/</span>
<a name="l00046"></a>00046 
<a name="l00047"></a>00047 <span class="comment">/* MakingThings */</span>
<a name="l00048"></a>00048 <span class="preprocessor">#include "config.h"</span>
<a name="l00049"></a>00049 <span class="preprocessor">#ifdef MAKE_CTRL_USB</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span>
<a name="l00051"></a>00051 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00052"></a>00052 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00053"></a>00053 <span class="preprocessor">#include "Board.h"</span>
<a name="l00054"></a>00054 <span class="preprocessor">#include "FreeRTOS.h"</span>
<a name="l00055"></a>00055 <span class="preprocessor">#include "task.h"</span>
<a name="l00056"></a>00056 <span class="preprocessor">#include "queue.h"</span>
<a name="l00057"></a>00057 <span class="preprocessor">#include "USB-CDC.h"</span>
<a name="l00058"></a>00058 <span class="preprocessor">#include "descriptors.h"</span>
<a name="l00059"></a>00059 
<a name="l00060"></a>00060 <span class="preprocessor">#define usbNO_BLOCK ( ( portTickType ) 0 )</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span>
<a name="l00062"></a>00062 <span class="comment">/* Reset all endpoints */</span>
<a name="l00063"></a>00063 <span class="keyword">static</span> <span class="keywordtype">void</span> prvResetEndPoints( <span class="keywordtype">void</span> );
<a name="l00064"></a>00064 
<a name="l00065"></a>00065 <span class="comment">/* Clear pull up resistor to detach device from host */</span>
<a name="l00066"></a>00066 <span class="keyword">static</span> <span class="keywordtype">void</span> vDetachUSBInterface( <span class="keywordtype">void</span> );
<a name="l00067"></a>00067 
<a name="l00068"></a>00068 <span class="comment">/* Set up interface and initialize variables */</span>
<a name="l00069"></a>00069 <span class="keyword">static</span> <span class="keywordtype">void</span> vInitUSBInterface( <span class="keywordtype">void</span> );
<a name="l00070"></a>00070 
<a name="l00071"></a>00071 <span class="comment">/* Handle control endpoint events. */</span>
<a name="l00072"></a>00072 <span class="keyword">static</span> <span class="keywordtype">void</span> prvProcessEndPoint0Interrupt( xISRStatus *pxMessage );
<a name="l00073"></a>00073 
<a name="l00074"></a>00074 <span class="comment">/* Handle standard device requests. */</span>
<a name="l00075"></a>00075 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleStandardDeviceRequest( xUSB_REQUEST *pxRequest );
<a name="l00076"></a>00076 
<a name="l00077"></a>00077 <span class="comment">/* Handle standard interface requests. */</span>
<a name="l00078"></a>00078 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleStandardInterfaceRequest( xUSB_REQUEST *pxRequest );
<a name="l00079"></a>00079 
<a name="l00080"></a>00080 <span class="comment">/* Handle endpoint requests. */</span>
<a name="l00081"></a>00081 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleStandardEndPointRequest( xUSB_REQUEST *pxRequest );
<a name="l00082"></a>00082 
<a name="l00083"></a>00083 <span class="comment">/* Handle class interface requests. */</span>
<a name="l00084"></a>00084 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleClassInterfaceRequest( xUSB_REQUEST *pxRequest );
<a name="l00085"></a>00085 
<a name="l00086"></a>00086 <span class="comment">/* Prepare control data transfer.  prvSendNextSegment starts transfer. */</span>
<a name="l00087"></a>00087 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendControlData( <span class="keywordtype">unsigned</span> portCHAR *pucData, <span class="keywordtype">unsigned</span> portSHORT usRequestedLength, <span class="keywordtype">unsigned</span> portLONG ulLengthLeftToSend, portLONG lSendingDescriptor );
<a name="l00088"></a>00088 
<a name="l00089"></a>00089 <span class="comment">/* Send next segment of data for the control transfer */</span>
<a name="l00090"></a>00090 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendNextSegment( <span class="keywordtype">void</span> );
<a name="l00091"></a>00091 
<a name="l00092"></a>00092 <span class="comment">/* Send stall - used to respond to unsupported requests */</span>
<a name="l00093"></a>00093 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendStall( <span class="keywordtype">void</span> );
<a name="l00094"></a>00094 
<a name="l00095"></a>00095 <span class="comment">/* Send a zero-length (null) packet */</span>
<a name="l00096"></a>00096 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendZLP( <span class="keywordtype">void</span> );
<a name="l00097"></a>00097 
<a name="l00098"></a>00098 <span class="comment">/* Handle requests for standard interface descriptors */</span>
<a name="l00099"></a>00099 <span class="keyword">static</span> <span class="keywordtype">void</span> prvGetStandardInterfaceDescriptor( xUSB_REQUEST *pxRequest );
<a name="l00100"></a>00100 
<a name="l00101"></a>00101 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00102"></a>00102 
<a name="l00103"></a>00103 <span class="comment">/* File scope static variables */</span>
<a name="l00104"></a>00104 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> portCHAR ucUSBConfig = ( <span class="keywordtype">unsigned</span> portCHAR ) 0;
<a name="l00105"></a>00105 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> portLONG ulReceivedAddress = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00106"></a>00106 <span class="keyword">static</span> eDRIVER_STATE eDriverState = eNOTHING;
<a name="l00107"></a>00107 
<a name="l00108"></a>00108 <span class="comment">/* Incoming and outgoing control data structures */</span>
<a name="l00109"></a>00109 <span class="keyword">static</span> xCONTROL_MESSAGE pxControlTx;
<a name="l00110"></a>00110 <span class="keyword">static</span> xCONTROL_MESSAGE pxControlRx;
<a name="l00111"></a>00111 
<a name="l00112"></a>00112 <span class="comment">/* Queue holding pointers to pending messages */</span>
<a name="l00113"></a>00113 xQueueHandle xUSBInterruptQueue; 
<a name="l00114"></a>00114 
<a name="l00115"></a>00115 <span class="comment">/* Queues used to hold received characters, and characters waiting to be</span>
<a name="l00116"></a>00116 <span class="comment">transmitted.  Rx queue must be larger than FIFO size. */</span>
<a name="l00117"></a>00117 xQueueHandle xRxCDC; 
<a name="l00118"></a>00118 xQueueHandle xTxCDC;
<a name="l00119"></a>00119 
<a name="l00120"></a>00120 <span class="comment">/* Line coding - 115,200 baud, N-8-1 */</span>
<a name="l00121"></a>00121 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> portCHAR pxLineCoding[] = { 0x00, 0xC2, 0x01, 0x00, 0x00, 0x00, 0x08 };
<a name="l00122"></a>00122 
<a name="l00123"></a>00123 <span class="comment">/* Status variables. */</span>
<a name="l00124"></a>00124 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> portCHAR ucControlState;
<a name="l00125"></a>00125 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> uiCurrentBank;
<a name="l00126"></a>00126 
<a name="l00127"></a>00127 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00128"></a>00128 <span class="keyword">extern</span> <span class="keywordtype">int</span> OscBusy;
<a name="l00129"></a>00129 <span class="keyword">extern</span> <span class="keywordtype">int</span> Usb_Running;
<a name="l00130"></a>00130 
<a name="l00131"></a>00131 <span class="keywordtype">void</span> vUSBCDCTask( <span class="keywordtype">void</span> *pvParameters )
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 xISRStatus *pxMessage;
<a name="l00134"></a>00134 <span class="keywordtype">unsigned</span> portLONG ulStatus;
<a name="l00135"></a>00135 <span class="keywordtype">unsigned</span> portLONG ulRxBytes;
<a name="l00136"></a>00136 
<a name="l00137"></a>00137   ( void ) pvParameters;
<a name="l00138"></a>00138 
<a name="l00139"></a>00139   <span class="comment">/* Disconnect USB device from hub.  For debugging - causes host to register reset */</span>
<a name="l00140"></a>00140   portENTER_CRITICAL();
<a name="l00141"></a>00141      vDetachUSBInterface();
<a name="l00142"></a>00142   portEXIT_CRITICAL();
<a name="l00143"></a>00143   
<a name="l00144"></a>00144   vTaskDelay( portTICK_RATE_MS * 60 );
<a name="l00145"></a>00145 
<a name="l00146"></a>00146   <span class="comment">/* Init USB interface */</span>
<a name="l00147"></a>00147   portENTER_CRITICAL();
<a name="l00148"></a>00148     vInitUSBInterface();
<a name="l00149"></a>00149   portEXIT_CRITICAL();
<a name="l00150"></a>00150   
<a name="l00151"></a>00151   <span class="comment">/* Main task loop.  Process incoming endpoint 0 interrupts, handle data transfers. */</span>
<a name="l00152"></a>00152    
<a name="l00153"></a>00153   <span class="comment">/* MAKINGTHINGS: USB RUNNING */</span>
<a name="l00154"></a>00154   Usb_Running = 1;
<a name="l00155"></a>00155 
<a name="l00156"></a>00156   <span class="keywordflow">for</span>( ;; )
<a name="l00157"></a>00157   {
<a name="l00158"></a>00158     <span class="comment">/* Look for data coming from the ISR. */</span>
<a name="l00159"></a>00159     <span class="keywordflow">if</span>( xQueueReceive( xUSBInterruptQueue, &amp;pxMessage, usbSHORTEST_DELAY ) )
<a name="l00160"></a>00160     {
<a name="l00161"></a>00161       <span class="keywordflow">if</span>( pxMessage-&gt;ulISR &amp; AT91C_UDP_EPINT0 )
<a name="l00162"></a>00162       {
<a name="l00163"></a>00163         <span class="comment">/* All endpoint 0 interrupts are handled here. */</span>
<a name="l00164"></a>00164         prvProcessEndPoint0Interrupt( pxMessage );
<a name="l00165"></a>00165       }
<a name="l00166"></a>00166 
<a name="l00167"></a>00167       <span class="keywordflow">if</span>( pxMessage-&gt;ulISR &amp; AT91C_UDP_ENDBUSRES )
<a name="l00168"></a>00168       {
<a name="l00169"></a>00169         <span class="comment">/* End of bus reset - reset the endpoints and de-configure. */</span>
<a name="l00170"></a>00170         prvResetEndPoints();    
<a name="l00171"></a>00171       }
<a name="l00172"></a>00172     }
<a name="l00173"></a>00173     
<a name="l00174"></a>00174     <span class="comment">/* See if we're ready to send and receive data. */</span>
<a name="l00175"></a>00175     <span class="keywordflow">if</span>( eDriverState == eREADY_TO_SEND &amp;&amp; ucControlState ) 
<a name="l00176"></a>00176     {
<a name="l00177"></a>00177       <span class="keywordflow">if</span>( ( !(AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_2 ] &amp; AT91C_UDP_TXPKTRDY) ) &amp;&amp; uxQueueMessagesWaiting( xTxCDC ) )
<a name="l00178"></a>00178       {
<a name="l00179"></a>00179         xBULKBUFFER Queue2USB;
<a name="l00180"></a>00180 
<a name="l00181"></a>00181         <span class="keywordflow">if</span>( xQueueReceive( xTxCDC, &amp;Queue2USB, 0 ) ) 
<a name="l00182"></a>00182         {
<a name="l00183"></a>00183           <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> out = 0;
<a name="l00184"></a>00184 
<a name="l00185"></a>00185           <span class="keywordflow">while</span> (out &lt; Queue2USB.Count)
<a name="l00186"></a>00186             AT91C_BASE_UDP-&gt;UDP_FDR[ usbEND_POINT_2 ] = Queue2USB.Data[out++];
<a name="l00187"></a>00187         }
<a name="l00188"></a>00188         AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_2 ] |= AT91C_UDP_TXPKTRDY;
<a name="l00189"></a>00189       }
<a name="l00190"></a>00190 
<a name="l00191"></a>00191       <span class="comment">/* Check for incoming data (host-to-device) on endpoint 1. */</span>
<a name="l00192"></a>00192       <span class="keywordflow">while</span>( AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_1 ] &amp; (AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1) )
<a name="l00193"></a>00193       {
<a name="l00194"></a>00194         <span class="comment">//if (!OscBusy)</span>
<a name="l00195"></a>00195         <span class="comment">//{</span>
<a name="l00196"></a>00196         <span class="comment">/* Only process FIFO if there's room to store it in the queue */</span>
<a name="l00197"></a>00197         <span class="keywordflow">if</span> ( USB_CDC_QUEUE_SIZE &gt; uxQueueMessagesWaiting( xRxCDC ))
<a name="l00198"></a>00198         { 
<a name="l00199"></a>00199           xBULKBUFFER USB2Queue;
<a name="l00200"></a>00200 
<a name="l00201"></a>00201           ulRxBytes = (AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_1 ] &gt;&gt; 16) &amp; usbRX_COUNT_MASK;
<a name="l00202"></a>00202           <span class="comment">// collect however many bytes are in endpoint ... may be a whole osc packet</span>
<a name="l00203"></a>00203           <span class="comment">// may just be a fragment.</span>
<a name="l00204"></a>00204           USB2Queue.Count = 0;
<a name="l00205"></a>00205           <span class="keywordflow">while</span>( ulRxBytes-- )
<a name="l00206"></a>00206             USB2Queue.Data[USB2Queue.Count++] = AT91C_BASE_UDP-&gt;UDP_FDR[ usbEND_POINT_1 ];
<a name="l00207"></a>00207 
<a name="l00208"></a>00208           <span class="comment">// put it in the queue</span>
<a name="l00209"></a>00209           xQueueSend( xRxCDC, &amp;USB2Queue, 0 );
<a name="l00210"></a>00210 
<a name="l00211"></a>00211           <span class="comment">/* Release the FIFO */</span>
<a name="l00212"></a>00212           portENTER_CRITICAL();
<a name="l00213"></a>00213           {
<a name="l00214"></a>00214             ulStatus = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_1 ];
<a name="l00215"></a>00215             usbCSR_CLEAR_BIT( &amp;ulStatus, uiCurrentBank );
<a name="l00216"></a>00216             AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_1 ] = ulStatus;
<a name="l00217"></a>00217           }
<a name="l00218"></a>00218           portEXIT_CRITICAL();
<a name="l00219"></a>00219 
<a name="l00220"></a>00220           <span class="comment">/* Re-enable endpoint 1's interrupts */</span>
<a name="l00221"></a>00221           AT91C_BASE_UDP-&gt;UDP_IER = AT91C_UDP_EPINT1;
<a name="l00222"></a>00222         
<a name="l00223"></a>00223           <span class="comment">/* Update the current bank in use */</span>
<a name="l00224"></a>00224           <span class="keywordflow">if</span>( uiCurrentBank == AT91C_UDP_RX_DATA_BK0 ) 
<a name="l00225"></a>00225             uiCurrentBank = AT91C_UDP_RX_DATA_BK1;
<a name="l00226"></a>00226           <span class="keywordflow">else</span> 
<a name="l00227"></a>00227             uiCurrentBank = AT91C_UDP_RX_DATA_BK0;
<a name="l00228"></a>00228 
<a name="l00229"></a>00229         }
<a name="l00230"></a>00230         <span class="keywordflow">else</span> 
<a name="l00231"></a>00231           <span class="keywordflow">break</span>;
<a name="l00232"></a>00232         <span class="comment">//}</span>
<a name="l00233"></a>00233       }
<a name="l00234"></a>00234     }
<a name="l00235"></a>00235   }
<a name="l00236"></a>00236 }
<a name="l00237"></a>00237 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00238"></a>00238 <span class="preprocessor">#if 0</span>
<a name="l00239"></a>00239 <span class="preprocessor"></span><span class="keywordtype">void</span> vUSBSendByte( portCHAR cByte, <span class="keywordtype">int</span> timeout )
<a name="l00240"></a>00240 {
<a name="l00241"></a>00241   <span class="keyword">static</span> xBULKBUFFER EnQueue;
<a name="l00242"></a>00242   <span class="keyword">static</span> <span class="keywordtype">char</span> inPacket = 0;  <span class="comment">// OSC packet detection eliminates need for tx timeouts</span>
<a name="l00243"></a>00243 
<a name="l00244"></a>00244   <span class="keywordflow">if</span> (!inPacket &amp;&amp; (cByte == SOP))
<a name="l00245"></a>00245   { 
<a name="l00246"></a>00246     inPacket = 1;
<a name="l00247"></a>00247     EnQueue.Count = 0;
<a name="l00248"></a>00248     EnQueue.Data[EnQueue.Count++] = cByte;
<a name="l00249"></a>00249   }
<a name="l00250"></a>00250   <span class="keywordflow">else</span>  <span class="comment">// in a packet</span>
<a name="l00251"></a>00251   {
<a name="l00252"></a>00252     EnQueue.Data[EnQueue.Count++] = cByte;
<a name="l00253"></a>00253 
<a name="l00254"></a>00254     <span class="comment">// if end of packet of buffer full, commit buffer to queue</span>
<a name="l00255"></a>00255     <span class="keywordflow">if</span> ((cByte == SOP) || (EnQueue.Count == EP_FIFO)) 
<a name="l00256"></a>00256     {
<a name="l00257"></a>00257       <span class="keywordflow">if</span> (cByte == SOP) inPacket = 0;
<a name="l00258"></a>00258 <span class="comment">//      if ( xQueueSend( xTxCDC, &amp;EnQueue, timeout ) != pdPASS )</span>
<a name="l00259"></a>00259       <span class="keywordflow">while</span> (xQueueSend( xTxCDC, &amp;EnQueue, 0 ) != pdPASS ) 
<a name="l00260"></a>00260         ;
<a name="l00261"></a>00261 
<a name="l00262"></a>00262       EnQueue.Count = 0;
<a name="l00263"></a>00263     }
<a name="l00264"></a>00264   }
<a name="l00265"></a>00265 }
<a name="l00266"></a>00266 <span class="preprocessor">#endif</span>
<a name="l00267"></a>00267 <span class="preprocessor"></span>
<a name="l00268"></a>00268 <span class="preprocessor">#if 0</span>
<a name="l00269"></a>00269 <span class="preprocessor"></span><span class="keyword">inline</span> <span class="keywordtype">int</span> cUSBGetByte( portTickType timeout )
<a name="l00270"></a>00270 {
<a name="l00271"></a>00271   <span class="keyword">static</span> xBULKBUFFER DeQueue;
<a name="l00272"></a>00272   <span class="keyword">static</span> <span class="keywordtype">char</span> QueueValid = 0;
<a name="l00273"></a>00273   <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> out;
<a name="l00274"></a>00274 
<a name="l00275"></a>00275   <span class="comment">// first look for bytes in a buffer we've already gotten</span>
<a name="l00276"></a>00276 drainQueue:
<a name="l00277"></a>00277   <span class="keywordflow">if</span> (QueueValid) {
<a name="l00278"></a>00278     <span class="keywordflow">if</span> (out &lt; DeQueue.Count)
<a name="l00279"></a>00279       <span class="keywordflow">return</span> DeQueue.Data[out++];  <span class="comment">// drain the buffer</span>
<a name="l00280"></a>00280     <span class="keywordflow">else</span>
<a name="l00281"></a>00281       QueueValid = 0;   <span class="comment">// buffer was empty ... next check for new one.</span>
<a name="l00282"></a>00282   }
<a name="l00283"></a>00283 
<a name="l00284"></a>00284   <span class="keywordflow">if</span> ( xQueueReceive( xRxCDC, &amp;DeQueue, timeout ) != pdFAIL )
<a name="l00285"></a>00285   {
<a name="l00286"></a>00286     <span class="comment">// got a new message from USB waiting on the queue</span>
<a name="l00287"></a>00287     out = 0;    <span class="comment">// reset drain index</span>
<a name="l00288"></a>00288     QueueValid = 1;   <span class="comment">// indicate we'll be working from the just copied message</span>
<a name="l00289"></a>00289     <span class="keywordflow">goto</span> drainQueue;  <span class="comment">// now go back and fetch the first entry from message</span>
<a name="l00290"></a>00290   }
<a name="l00291"></a>00291   <span class="keywordflow">else</span>
<a name="l00292"></a>00292     <span class="keywordflow">return</span> -1;        <span class="comment">// nope, there was really nothing available</span>
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294 <span class="preprocessor">#endif</span>
<a name="l00295"></a>00295 <span class="preprocessor"></span><span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00296"></a>00296 
<a name="l00297"></a>00297 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendZLP( <span class="keywordtype">void</span> )
<a name="l00298"></a>00298 {
<a name="l00299"></a>00299 <span class="keywordtype">unsigned</span> portLONG ulStatus;
<a name="l00300"></a>00300 
<a name="l00301"></a>00301   <span class="comment">/* Wait until the FIFO is free - even though we are not going to use it.</span>
<a name="l00302"></a>00302 <span class="comment">  THERE IS NO TIMEOUT HERE! */</span>
<a name="l00303"></a>00303   <span class="keywordflow">while</span>( AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ] &amp; AT91C_UDP_TXPKTRDY )
<a name="l00304"></a>00304   {
<a name="l00305"></a>00305     vTaskDelay( usbSHORTEST_DELAY );
<a name="l00306"></a>00306   }
<a name="l00307"></a>00307 
<a name="l00308"></a>00308   portENTER_CRITICAL();
<a name="l00309"></a>00309   {
<a name="l00310"></a>00310     <span class="comment">/* Cancel any further pending data */</span>
<a name="l00311"></a>00311     pxControlTx.ulTotalDataLength = pxControlTx.ulNextCharIndex;
<a name="l00312"></a>00312 
<a name="l00313"></a>00313     <span class="comment">/* Set the TXPKTRDY bit to cause a transmission with no data. */</span>
<a name="l00314"></a>00314     ulStatus = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ];
<a name="l00315"></a>00315     usbCSR_SET_BIT( &amp;ulStatus, AT91C_UDP_TXPKTRDY );
<a name="l00316"></a>00316     AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
<a name="l00317"></a>00317   }
<a name="l00318"></a>00318   portEXIT_CRITICAL();
<a name="l00319"></a>00319 }
<a name="l00320"></a>00320 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00321"></a>00321 
<a name="l00322"></a>00322 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendStall( <span class="keywordtype">void</span> )
<a name="l00323"></a>00323 {
<a name="l00324"></a>00324   <span class="keywordtype">unsigned</span> portLONG ulStatus;
<a name="l00325"></a>00325 
<a name="l00326"></a>00326   portENTER_CRITICAL();
<a name="l00327"></a>00327   {
<a name="l00328"></a>00328     <span class="comment">/* Force a stall by simply setting the FORCESTALL bit in the CSR. */</span>
<a name="l00329"></a>00329     ulStatus = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ];
<a name="l00330"></a>00330     usbCSR_SET_BIT( &amp;ulStatus, AT91C_UDP_FORCESTALL );
<a name="l00331"></a>00331     AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
<a name="l00332"></a>00332   }
<a name="l00333"></a>00333   portEXIT_CRITICAL();
<a name="l00334"></a>00334 }
<a name="l00335"></a>00335 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00336"></a>00336 
<a name="l00337"></a>00337 <span class="keyword">static</span> <span class="keywordtype">void</span> prvResetEndPoints( <span class="keywordtype">void</span> )
<a name="l00338"></a>00338 {
<a name="l00339"></a>00339 <span class="keywordtype">unsigned</span> portLONG ulTemp;
<a name="l00340"></a>00340 
<a name="l00341"></a>00341   eDriverState = eJUST_RESET;
<a name="l00342"></a>00342   ucControlState = 0;
<a name="l00343"></a>00343 
<a name="l00344"></a>00344   <span class="comment">/* Reset all the end points. */</span>
<a name="l00345"></a>00345   AT91C_BASE_UDP-&gt;UDP_RSTEP  = usbEND_POINT_RESET_MASK;
<a name="l00346"></a>00346   AT91C_BASE_UDP-&gt;UDP_RSTEP  = ( <span class="keywordtype">unsigned</span> portLONG ) 0x00;
<a name="l00347"></a>00347 
<a name="l00348"></a>00348   <span class="comment">/* Enable data to be sent and received. */</span>
<a name="l00349"></a>00349   AT91C_BASE_UDP-&gt;UDP_FADDR = AT91C_UDP_FEN;
<a name="l00350"></a>00350 
<a name="l00351"></a>00351   <span class="comment">/* Repair the configuration end point. */</span>
<a name="l00352"></a>00352   portENTER_CRITICAL();
<a name="l00353"></a>00353   {
<a name="l00354"></a>00354     ulTemp = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ];
<a name="l00355"></a>00355     usbCSR_SET_BIT( &amp;ulTemp, ( ( <span class="keywordtype">unsigned</span> portLONG ) ( AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL ) ) );
<a name="l00356"></a>00356     AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ] = ulTemp;
<a name="l00357"></a>00357     AT91C_BASE_UDP-&gt;UDP_IER = AT91C_UDP_EPINT0;
<a name="l00358"></a>00358   }
<a name="l00359"></a>00359   portEXIT_CRITICAL();
<a name="l00360"></a>00360   uiCurrentBank = AT91C_UDP_RX_DATA_BK0;
<a name="l00361"></a>00361 }
<a name="l00362"></a>00362 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00363"></a>00363 
<a name="l00364"></a>00364 <span class="keyword">static</span> <span class="keywordtype">void</span> prvProcessEndPoint0Interrupt( xISRStatus *pxMessage )
<a name="l00365"></a>00365 {
<a name="l00366"></a>00366 <span class="keyword">static</span> xUSB_REQUEST xRequest;
<a name="l00367"></a>00367 <span class="keywordtype">unsigned</span> portLONG ulRxBytes;
<a name="l00368"></a>00368 
<a name="l00369"></a>00369   <span class="comment">/* Get number of bytes received, if any */</span>
<a name="l00370"></a>00370   ulRxBytes = pxMessage-&gt;ulCSR0 &gt;&gt; 16;
<a name="l00371"></a>00371   ulRxBytes &amp;= usbRX_COUNT_MASK;
<a name="l00372"></a>00372 
<a name="l00373"></a>00373   <span class="keywordflow">if</span>( pxMessage-&gt;ulCSR0 &amp; AT91C_UDP_TXCOMP )
<a name="l00374"></a>00374   {
<a name="l00375"></a>00375     <span class="comment">/* We received a TX complete interrupt.  What we do depends on</span>
<a name="l00376"></a>00376 <span class="comment">    what we sent to get this interrupt. */</span>
<a name="l00377"></a>00377 
<a name="l00378"></a>00378     <span class="keywordflow">if</span>( eDriverState == eJUST_GOT_CONFIG )
<a name="l00379"></a>00379     {
<a name="l00380"></a>00380       <span class="comment">/* We sent an acknowledgement of a SET_CONFIG request.  We</span>
<a name="l00381"></a>00381 <span class="comment">      are now at the end of the enumeration.</span>
<a name="l00382"></a>00382 <span class="comment">      </span>
<a name="l00383"></a>00383 <span class="comment">      TODO: Config 0 sets unconfigured state, should enter Address state.</span>
<a name="l00384"></a>00384 <span class="comment">      Request for unsupported config should stall. */</span>
<a name="l00385"></a>00385       AT91C_BASE_UDP-&gt;UDP_GLBSTATE = AT91C_UDP_CONFG;
<a name="l00386"></a>00386       
<a name="l00387"></a>00387       <span class="comment">/* Set up endpoints */</span>
<a name="l00388"></a>00388       portENTER_CRITICAL();
<a name="l00389"></a>00389       {
<a name="l00390"></a>00390         <span class="keywordtype">unsigned</span> portLONG ulTemp;
<a name="l00391"></a>00391 
<a name="l00392"></a>00392         <span class="comment">/* Set endpoint 1 to bulk-out */</span>
<a name="l00393"></a>00393         ulTemp = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_1 ];         
<a name="l00394"></a>00394         usbCSR_SET_BIT( &amp;ulTemp, AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT );
<a name="l00395"></a>00395         AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_1 ] = ulTemp;   
<a name="l00396"></a>00396         AT91C_BASE_UDP-&gt;UDP_IER = AT91C_UDP_EPINT1;
<a name="l00397"></a>00397         <span class="comment">/* Set endpoint 2 to bulk-in */</span>
<a name="l00398"></a>00398         ulTemp = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_2 ];         
<a name="l00399"></a>00399         usbCSR_SET_BIT( &amp;ulTemp, AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN );
<a name="l00400"></a>00400         AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_2 ] = ulTemp;   
<a name="l00401"></a>00401         AT91C_BASE_UDP-&gt;UDP_IER = AT91C_UDP_EPINT2;
<a name="l00402"></a>00402           <span class="comment">/* Set endpoint 3 to interrupt-in, enable it, and enable interrupts */</span>
<a name="l00403"></a>00403         ulTemp = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_3 ];         
<a name="l00404"></a>00404         usbCSR_SET_BIT( &amp;ulTemp, AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN );
<a name="l00405"></a>00405         AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_3 ] = ulTemp;   
<a name="l00406"></a>00406         <span class="comment">/*AT91F_UDP_EnableIt( AT91C_BASE_UDP, AT91C_UDP_EPINT3 );        */</span>
<a name="l00407"></a>00407       }
<a name="l00408"></a>00408       portEXIT_CRITICAL();
<a name="l00409"></a>00409 
<a name="l00410"></a>00410       eDriverState = eREADY_TO_SEND;
<a name="l00411"></a>00411     }   
<a name="l00412"></a>00412     <span class="keywordflow">else</span> <span class="keywordflow">if</span>( eDriverState == eJUST_GOT_ADDRESS )
<a name="l00413"></a>00413     {
<a name="l00414"></a>00414       <span class="comment">/* We sent an acknowledgement of a SET_ADDRESS request.  Move</span>
<a name="l00415"></a>00415 <span class="comment">      to the addressed state. */</span>
<a name="l00416"></a>00416       <span class="keywordflow">if</span>( ulReceivedAddress != ( <span class="keywordtype">unsigned</span> portLONG ) 0 )
<a name="l00417"></a>00417       {     
<a name="l00418"></a>00418         AT91C_BASE_UDP-&gt;UDP_GLBSTATE = AT91C_UDP_FADDEN;
<a name="l00419"></a>00419       }
<a name="l00420"></a>00420       <span class="keywordflow">else</span>
<a name="l00421"></a>00421       {
<a name="l00422"></a>00422         AT91C_BASE_UDP-&gt;UDP_GLBSTATE = 0;
<a name="l00423"></a>00423       }     
<a name="l00424"></a>00424 
<a name="l00425"></a>00425       AT91C_BASE_UDP-&gt;UDP_FADDR = ( AT91C_UDP_FEN | ulReceivedAddress );    
<a name="l00426"></a>00426       eDriverState = eNOTHING;
<a name="l00427"></a>00427     }
<a name="l00428"></a>00428     <span class="keywordflow">else</span>
<a name="l00429"></a>00429     {   
<a name="l00430"></a>00430       <span class="comment">/* The TXCOMP was not for any special type of transmission.  See</span>
<a name="l00431"></a>00431 <span class="comment">      if there is any more data to send. */</span>
<a name="l00432"></a>00432       prvSendNextSegment();
<a name="l00433"></a>00433     }
<a name="l00434"></a>00434   }
<a name="l00435"></a>00435 
<a name="l00436"></a>00436   <span class="keywordflow">if</span>( pxMessage-&gt;ulCSR0 &amp; AT91C_UDP_RX_DATA_BK0 )
<a name="l00437"></a>00437   {
<a name="l00438"></a>00438     <span class="comment">/* Received a control data packet.  May be a 0-length ACK or a data stage. */</span>
<a name="l00439"></a>00439     <span class="keywordtype">unsigned</span> portCHAR ucBytesToGet;
<a name="l00440"></a>00440    
<a name="l00441"></a>00441     <span class="comment">/* Got data.  Cancel any outgoing data. */</span>
<a name="l00442"></a>00442     pxControlTx.ulNextCharIndex = pxControlTx.ulTotalDataLength;
<a name="l00443"></a>00443     
<a name="l00444"></a>00444      <span class="comment">/* Determine how many bytes we need to receive. */</span>
<a name="l00445"></a>00445     ucBytesToGet = pxControlRx.ulTotalDataLength - pxControlRx.ulNextCharIndex;
<a name="l00446"></a>00446     <span class="keywordflow">if</span>( ucBytesToGet &gt; ulRxBytes ) 
<a name="l00447"></a>00447     { 
<a name="l00448"></a>00448       ucBytesToGet = ulRxBytes;
<a name="l00449"></a>00449     }
<a name="l00450"></a>00450 
<a name="l00451"></a>00451     <span class="comment">/* If we're not expecting any data, it's an ack - just quit now. */</span>
<a name="l00452"></a>00452     <span class="keywordflow">if</span>( !ucBytesToGet )
<a name="l00453"></a>00453     {
<a name="l00454"></a>00454        <span class="keywordflow">return</span>;
<a name="l00455"></a>00455     }
<a name="l00456"></a>00456 
<a name="l00457"></a>00457     <span class="comment">/* Get the required data and update the index. */</span>
<a name="l00458"></a>00458     memcpy( pxControlRx.ucBuffer, pxMessage-&gt;ucFifoData, ucBytesToGet );
<a name="l00459"></a>00459     pxControlRx.ulNextCharIndex += ucBytesToGet;  
<a name="l00460"></a>00460   }
<a name="l00461"></a>00461 
<a name="l00462"></a>00462   <span class="keywordflow">if</span>( pxMessage-&gt;ulCSR0 &amp; AT91C_UDP_RXSETUP )
<a name="l00463"></a>00463   {
<a name="l00464"></a>00464     <span class="comment">/* Received a SETUP packet.  May be followed by data packets. */</span>
<a name="l00465"></a>00465 
<a name="l00466"></a>00466     <span class="keywordflow">if</span>( ulRxBytes &gt;= usbEXPECTED_NUMBER_OF_BYTES )
<a name="l00467"></a>00467     {       
<a name="l00468"></a>00468       <span class="comment">/* Create an xUSB_REQUEST variable from the raw bytes array. */</span>
<a name="l00469"></a>00469 
<a name="l00470"></a>00470       xRequest.ucReqType = pxMessage-&gt;ucFifoData[ usbREQUEST_TYPE_INDEX ];
<a name="l00471"></a>00471       xRequest.ucRequest = pxMessage-&gt;ucFifoData[ usbREQUEST_INDEX ];
<a name="l00472"></a>00472 
<a name="l00473"></a>00473       xRequest.usValue = pxMessage-&gt;ucFifoData[ usbVALUE_HIGH_BYTE ];
<a name="l00474"></a>00474       xRequest.usValue &lt;&lt;= 8;
<a name="l00475"></a>00475       xRequest.usValue |= pxMessage-&gt;ucFifoData[ usbVALUE_LOW_BYTE ];
<a name="l00476"></a>00476             
<a name="l00477"></a>00477       xRequest.usIndex = pxMessage-&gt;ucFifoData[ usbINDEX_HIGH_BYTE ];
<a name="l00478"></a>00478       xRequest.usIndex &lt;&lt;= 8;
<a name="l00479"></a>00479       xRequest.usIndex |= pxMessage-&gt;ucFifoData[ usbINDEX_LOW_BYTE ];
<a name="l00480"></a>00480       
<a name="l00481"></a>00481       xRequest.usLength = pxMessage-&gt;ucFifoData[ usbLENGTH_HIGH_BYTE ];
<a name="l00482"></a>00482       xRequest.usLength &lt;&lt;= 8;
<a name="l00483"></a>00483       xRequest.usLength |= pxMessage-&gt;ucFifoData[ usbLENGTH_LOW_BYTE ];
<a name="l00484"></a>00484 
<a name="l00485"></a>00485       pxControlRx.ulNextCharIndex = 0;
<a name="l00486"></a>00486       <span class="keywordflow">if</span>( ! (xRequest.ucReqType &amp; 0x80) ) <span class="comment">/* Host-to-Device transfer, may need to get data first */</span>
<a name="l00487"></a>00487       {
<a name="l00488"></a>00488         <span class="keywordflow">if</span>( xRequest.usLength &gt; usbMAX_CONTROL_MESSAGE_SIZE )
<a name="l00489"></a>00489         { 
<a name="l00490"></a>00490           <span class="comment">/* Too big!  No space for control data, stall and abort. */</span>
<a name="l00491"></a>00491           prvSendStall();
<a name="l00492"></a>00492           <span class="keywordflow">return</span>;
<a name="l00493"></a>00493         }
<a name="l00494"></a>00494 
<a name="l00495"></a>00495         pxControlRx.ulTotalDataLength = xRequest.usLength;
<a name="l00496"></a>00496       }
<a name="l00497"></a>00497       <span class="keywordflow">else</span>
<a name="l00498"></a>00498       {
<a name="l00499"></a>00499         <span class="comment">/* We're sending the data, don't wait for any. */</span>
<a name="l00500"></a>00500         pxControlRx.ulTotalDataLength = 0; 
<a name="l00501"></a>00501       }
<a name="l00502"></a>00502     }
<a name="l00503"></a>00503   }
<a name="l00504"></a>00504 
<a name="l00505"></a>00505   <span class="comment">/* See if we've got a pending request and all its associated data ready */</span>
<a name="l00506"></a>00506   <span class="keywordflow">if</span>( ( pxMessage-&gt;ulCSR0 &amp; ( AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RXSETUP ) ) 
<a name="l00507"></a>00507     &amp;&amp; ( pxControlRx.ulNextCharIndex &gt;= pxControlRx.ulTotalDataLength ) )
<a name="l00508"></a>00508   {
<a name="l00509"></a>00509     <span class="keywordtype">unsigned</span> portCHAR ucRequest;
<a name="l00510"></a>00510 
<a name="l00511"></a>00511     <span class="comment">/* Manipulate the ucRequestType and the ucRequest parameters to </span>
<a name="l00512"></a>00512 <span class="comment">    generate a zero based request selection.  This is just done to </span>
<a name="l00513"></a>00513 <span class="comment">    break up the requests into subsections for clarity.  The </span>
<a name="l00514"></a>00514 <span class="comment">    alternative would be to have more huge switch statement that would</span>
<a name="l00515"></a>00515 <span class="comment">    be difficult to optimise. */</span>
<a name="l00516"></a>00516     ucRequest = ( ( xRequest.ucReqType &amp; 0x60 ) &gt;&gt; 3 );
<a name="l00517"></a>00517     ucRequest |= ( xRequest.ucReqType &amp; 0x03 );
<a name="l00518"></a>00518       
<a name="l00519"></a>00519     <span class="keywordflow">switch</span>( ucRequest )
<a name="l00520"></a>00520     {
<a name="l00521"></a>00521       <span class="keywordflow">case</span> usbSTANDARD_DEVICE_REQUEST:  
<a name="l00522"></a>00522         <span class="comment">/* Standard Device request */</span>
<a name="l00523"></a>00523         prvHandleStandardDeviceRequest( &amp;xRequest );
<a name="l00524"></a>00524         <span class="keywordflow">break</span>;
<a name="l00525"></a>00525 
<a name="l00526"></a>00526       <span class="keywordflow">case</span> usbSTANDARD_INTERFACE_REQUEST: 
<a name="l00527"></a>00527         <span class="comment">/* Standard Interface request */</span>
<a name="l00528"></a>00528         prvHandleStandardInterfaceRequest( &amp;xRequest );
<a name="l00529"></a>00529         <span class="keywordflow">break</span>;
<a name="l00530"></a>00530 
<a name="l00531"></a>00531       <span class="keywordflow">case</span> usbSTANDARD_END_POINT_REQUEST: 
<a name="l00532"></a>00532         <span class="comment">/* Standard Endpoint request */</span>
<a name="l00533"></a>00533         prvHandleStandardEndPointRequest( &amp;xRequest );
<a name="l00534"></a>00534         <span class="keywordflow">break</span>;
<a name="l00535"></a>00535 
<a name="l00536"></a>00536       <span class="keywordflow">case</span> usbCLASS_INTERFACE_REQUEST:  
<a name="l00537"></a>00537         <span class="comment">/* Class Interface request */</span>
<a name="l00538"></a>00538         prvHandleClassInterfaceRequest( &amp;xRequest );
<a name="l00539"></a>00539         <span class="keywordflow">break</span>;
<a name="l00540"></a>00540 
<a name="l00541"></a>00541       <span class="keywordflow">default</span>:  <span class="comment">/* This is not something we want to respond to. */</span>
<a name="l00542"></a>00542         prvSendStall(); 
<a name="l00543"></a>00543     }
<a name="l00544"></a>00544   }
<a name="l00545"></a>00545 }
<a name="l00546"></a>00546 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00547"></a>00547 
<a name="l00548"></a>00548 <span class="keyword">static</span> <span class="keywordtype">void</span> prvGetStandardDeviceDescriptor( xUSB_REQUEST *pxRequest )
<a name="l00549"></a>00549 {
<a name="l00550"></a>00550   <span class="comment">/* The type is in the high byte.  Return whatever has been requested. */</span>
<a name="l00551"></a>00551   <span class="keywordflow">switch</span>( ( pxRequest-&gt;usValue &amp; 0xff00 ) &gt;&gt; 8 )
<a name="l00552"></a>00552   {
<a name="l00553"></a>00553     <span class="keywordflow">case</span> usbDESCRIPTOR_TYPE_DEVICE:
<a name="l00554"></a>00554       prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;pxDeviceDescriptor, pxRequest-&gt;usLength, <span class="keyword">sizeof</span>( pxDeviceDescriptor ), pdTRUE );
<a name="l00555"></a>00555       <span class="keywordflow">break</span>;
<a name="l00556"></a>00556 
<a name="l00557"></a>00557     <span class="keywordflow">case</span> usbDESCRIPTOR_TYPE_CONFIGURATION:
<a name="l00558"></a>00558       prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;( pxConfigDescriptor ), pxRequest-&gt;usLength, <span class="keyword">sizeof</span>( pxConfigDescriptor ), pdTRUE );
<a name="l00559"></a>00559       <span class="keywordflow">break</span>;
<a name="l00560"></a>00560 
<a name="l00561"></a>00561     <span class="keywordflow">case</span> usbDESCRIPTOR_TYPE_STRING:
<a name="l00562"></a>00562 
<a name="l00563"></a>00563       <span class="comment">/* The index to the string descriptor is the lower byte. */</span>
<a name="l00564"></a>00564       <span class="keywordflow">switch</span>( pxRequest-&gt;usValue &amp; 0xff )
<a name="l00565"></a>00565       {     
<a name="l00566"></a>00566         <span class="keywordflow">case</span> usbLANGUAGE_STRING:
<a name="l00567"></a>00567           prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;pxLanguageStringDescriptor, pxRequest-&gt;usLength, <span class="keyword">sizeof</span>(pxLanguageStringDescriptor), pdTRUE );
<a name="l00568"></a>00568           <span class="keywordflow">break</span>;
<a name="l00569"></a>00569 
<a name="l00570"></a>00570         <span class="keywordflow">case</span> usbMANUFACTURER_STRING:
<a name="l00571"></a>00571           prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;pxManufacturerStringDescriptor, pxRequest-&gt;usLength, <span class="keyword">sizeof</span>( pxManufacturerStringDescriptor ), pdTRUE );
<a name="l00572"></a>00572           <span class="keywordflow">break</span>;
<a name="l00573"></a>00573 
<a name="l00574"></a>00574         <span class="keywordflow">case</span> usbPRODUCT_STRING:
<a name="l00575"></a>00575           prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;pxProductStringDescriptor, pxRequest-&gt;usLength, <span class="keyword">sizeof</span>( pxProductStringDescriptor ), pdTRUE );
<a name="l00576"></a>00576           <span class="keywordflow">break</span>;
<a name="l00577"></a>00577 
<a name="l00578"></a>00578         <span class="keywordflow">case</span> usbCONFIGURATION_STRING:
<a name="l00579"></a>00579           prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;pxConfigurationStringDescriptor, pxRequest-&gt;usLength, <span class="keyword">sizeof</span>( pxConfigurationStringDescriptor ), pdTRUE );
<a name="l00580"></a>00580           <span class="keywordflow">break</span>;
<a name="l00581"></a>00581 
<a name="l00582"></a>00582         <span class="keywordflow">case</span> usbINTERFACE_STRING:
<a name="l00583"></a>00583           prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;pxInterfaceStringDescriptor, pxRequest-&gt;usLength, <span class="keyword">sizeof</span>( pxInterfaceStringDescriptor ), pdTRUE );
<a name="l00584"></a>00584           <span class="keywordflow">break</span>;
<a name="l00585"></a>00585 
<a name="l00586"></a>00586         <span class="keywordflow">default</span>:
<a name="l00587"></a>00587           prvSendStall();
<a name="l00588"></a>00588           <span class="keywordflow">break</span>;
<a name="l00589"></a>00589       }
<a name="l00590"></a>00590       <span class="keywordflow">break</span>;
<a name="l00591"></a>00591 
<a name="l00592"></a>00592     <span class="keywordflow">default</span>:
<a name="l00593"></a>00593       prvSendStall();
<a name="l00594"></a>00594       <span class="keywordflow">break</span>;
<a name="l00595"></a>00595   }
<a name="l00596"></a>00596 }
<a name="l00597"></a>00597 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00598"></a>00598 
<a name="l00599"></a>00599 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleStandardDeviceRequest( xUSB_REQUEST *pxRequest )
<a name="l00600"></a>00600 {
<a name="l00601"></a>00601 <span class="keywordtype">unsigned</span> portSHORT usStatus = 0;
<a name="l00602"></a>00602 
<a name="l00603"></a>00603   <span class="keywordflow">switch</span>( pxRequest-&gt;ucRequest )
<a name="l00604"></a>00604   {
<a name="l00605"></a>00605     <span class="keywordflow">case</span> usbGET_STATUS_REQUEST:
<a name="l00606"></a>00606       <span class="comment">/* Just send two byte dummy status. */</span>
<a name="l00607"></a>00607       prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;usStatus, <span class="keyword">sizeof</span>( usStatus ), <span class="keyword">sizeof</span>( usStatus ), pdFALSE );
<a name="l00608"></a>00608       <span class="keywordflow">break</span>;
<a name="l00609"></a>00609 
<a name="l00610"></a>00610     <span class="keywordflow">case</span> usbGET_DESCRIPTOR_REQUEST:
<a name="l00611"></a>00611       <span class="comment">/* Send device descriptor */</span>
<a name="l00612"></a>00612       prvGetStandardDeviceDescriptor( pxRequest );
<a name="l00613"></a>00613       <span class="keywordflow">break</span>;
<a name="l00614"></a>00614 
<a name="l00615"></a>00615     <span class="keywordflow">case</span> usbGET_CONFIGURATION_REQUEST:
<a name="l00616"></a>00616       <span class="comment">/* Send selected device configuration */</span>
<a name="l00617"></a>00617       prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;ucUSBConfig, <span class="keyword">sizeof</span>( ucUSBConfig ), <span class="keyword">sizeof</span>( ucUSBConfig ), pdFALSE );
<a name="l00618"></a>00618       <span class="keywordflow">break</span>;
<a name="l00619"></a>00619 
<a name="l00620"></a>00620     <span class="keywordflow">case</span> usbSET_FEATURE_REQUEST:
<a name="l00621"></a>00621       prvSendZLP();
<a name="l00622"></a>00622       <span class="keywordflow">break</span>;
<a name="l00623"></a>00623 
<a name="l00624"></a>00624     <span class="keywordflow">case</span> usbSET_ADDRESS_REQUEST:      
<a name="l00625"></a>00625       <span class="comment">/* Get assigned address and send ack, but don't implement new address until we get a TXCOMP */</span>
<a name="l00626"></a>00626       prvSendZLP();     
<a name="l00627"></a>00627       eDriverState = eJUST_GOT_ADDRESS;     
<a name="l00628"></a>00628       ulReceivedAddress = ( <span class="keywordtype">unsigned</span> portLONG ) pxRequest-&gt;usValue;
<a name="l00629"></a>00629       <span class="keywordflow">break</span>;
<a name="l00630"></a>00630 
<a name="l00631"></a>00631     <span class="keywordflow">case</span> usbSET_CONFIGURATION_REQUEST:
<a name="l00632"></a>00632       <span class="comment">/* Ack SET_CONFIGURATION request, but don't implement until TXCOMP */</span>
<a name="l00633"></a>00633       ucUSBConfig = ( <span class="keywordtype">unsigned</span> portCHAR ) ( pxRequest-&gt;usValue &amp; 0xff );
<a name="l00634"></a>00634       eDriverState = eJUST_GOT_CONFIG;
<a name="l00635"></a>00635       prvSendZLP();
<a name="l00636"></a>00636       <span class="keywordflow">break</span>;
<a name="l00637"></a>00637 
<a name="l00638"></a>00638     <span class="keywordflow">default</span>:
<a name="l00639"></a>00639       <span class="comment">/* Any unsupported request results in a STALL response. */</span>
<a name="l00640"></a>00640       prvSendStall();
<a name="l00641"></a>00641       <span class="keywordflow">break</span>;
<a name="l00642"></a>00642   }
<a name="l00643"></a>00643 }
<a name="l00644"></a>00644 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00645"></a>00645 
<a name="l00646"></a>00646 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleClassInterfaceRequest( xUSB_REQUEST *pxRequest )
<a name="l00647"></a>00647 {
<a name="l00648"></a>00648   <span class="keywordflow">switch</span>( pxRequest-&gt;ucRequest )
<a name="l00649"></a>00649   {
<a name="l00650"></a>00650     <span class="keywordflow">case</span> usbSEND_ENCAPSULATED_COMMAND:
<a name="l00651"></a>00651       prvSendStall();
<a name="l00652"></a>00652       <span class="keywordflow">break</span>;
<a name="l00653"></a>00653 
<a name="l00654"></a>00654     <span class="keywordflow">case</span> usbGET_ENCAPSULATED_RESPONSE:
<a name="l00655"></a>00655       prvSendStall();
<a name="l00656"></a>00656       <span class="keywordflow">break</span>;
<a name="l00657"></a>00657 
<a name="l00658"></a>00658     <span class="keywordflow">case</span> usbSET_LINE_CODING:
<a name="l00659"></a>00659       <span class="comment">/* Set line coding - baud rate, data bits, parity, stop bits */</span>
<a name="l00660"></a>00660       prvSendZLP();
<a name="l00661"></a>00661       memcpy( ( <span class="keywordtype">void</span> * ) pxLineCoding, pxControlRx.ucBuffer, <span class="keyword">sizeof</span>( pxLineCoding ) );
<a name="l00662"></a>00662       <span class="keywordflow">break</span>;
<a name="l00663"></a>00663 
<a name="l00664"></a>00664     <span class="keywordflow">case</span> usbGET_LINE_CODING:
<a name="l00665"></a>00665       <span class="comment">/* Get line coding */</span>
<a name="l00666"></a>00666       prvSendControlData( (<span class="keywordtype">unsigned</span> portCHAR *) &amp;pxLineCoding, pxRequest-&gt;usLength, <span class="keyword">sizeof</span>( pxLineCoding ), pdFALSE );
<a name="l00667"></a>00667       <span class="keywordflow">break</span>;
<a name="l00668"></a>00668 
<a name="l00669"></a>00669     <span class="keywordflow">case</span> usbSET_CONTROL_LINE_STATE:
<a name="l00670"></a>00670       <span class="comment">/* D0: 1=DTR, 0=No DTR,  D1: 1=Activate Carrier, 0=Deactivate carrier (RTS, half-duplex) */</span>
<a name="l00671"></a>00671       prvSendZLP();
<a name="l00672"></a>00672       ucControlState = pxRequest-&gt;usValue;
<a name="l00673"></a>00673       <span class="keywordflow">break</span>;
<a name="l00674"></a>00674 
<a name="l00675"></a>00675     <span class="keywordflow">default</span>:
<a name="l00676"></a>00676       prvSendStall();
<a name="l00677"></a>00677       <span class="keywordflow">break</span>;
<a name="l00678"></a>00678   }
<a name="l00679"></a>00679 }
<a name="l00680"></a>00680 <span class="comment">/*------------------------------------------------------------*/</span>
<a name="l00681"></a>00681 
<a name="l00682"></a>00682 <span class="keyword">static</span> <span class="keywordtype">void</span> prvGetStandardInterfaceDescriptor( xUSB_REQUEST *pxRequest )
<a name="l00683"></a>00683 {
<a name="l00684"></a>00684   <span class="keywordflow">switch</span>( ( pxRequest-&gt;usValue &amp; ( <span class="keywordtype">unsigned</span> portSHORT ) 0xff00 ) &gt;&gt; 8 )
<a name="l00685"></a>00685   {
<a name="l00686"></a>00686     <span class="keywordflow">default</span>:
<a name="l00687"></a>00687       prvSendStall();
<a name="l00688"></a>00688       <span class="keywordflow">break</span>;
<a name="l00689"></a>00689   }
<a name="l00690"></a>00690 }
<a name="l00691"></a>00691 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00692"></a>00692 
<a name="l00693"></a>00693 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleStandardInterfaceRequest( xUSB_REQUEST *pxRequest )
<a name="l00694"></a>00694 {
<a name="l00695"></a>00695 <span class="keywordtype">unsigned</span> portSHORT usStatus = 0;
<a name="l00696"></a>00696 
<a name="l00697"></a>00697   <span class="keywordflow">switch</span>( pxRequest-&gt;ucRequest )
<a name="l00698"></a>00698   {
<a name="l00699"></a>00699     <span class="keywordflow">case</span> usbGET_STATUS_REQUEST:
<a name="l00700"></a>00700       <span class="comment">/* Send dummy 2 bytes. */</span>
<a name="l00701"></a>00701       prvSendControlData( ( <span class="keywordtype">unsigned</span> portCHAR * ) &amp;usStatus, <span class="keyword">sizeof</span>( usStatus ), <span class="keyword">sizeof</span>( usStatus ), pdFALSE );
<a name="l00702"></a>00702       <span class="keywordflow">break</span>;
<a name="l00703"></a>00703 
<a name="l00704"></a>00704     <span class="keywordflow">case</span> usbGET_DESCRIPTOR_REQUEST:
<a name="l00705"></a>00705       prvGetStandardInterfaceDescriptor( pxRequest ); 
<a name="l00706"></a>00706       <span class="keywordflow">break</span>;
<a name="l00707"></a>00707 
<a name="l00708"></a>00708     <span class="comment">/* This minimal implementation does not respond to these. */</span>
<a name="l00709"></a>00709     <span class="keywordflow">case</span> usbGET_INTERFACE_REQUEST:
<a name="l00710"></a>00710     <span class="keywordflow">case</span> usbSET_FEATURE_REQUEST:
<a name="l00711"></a>00711     <span class="keywordflow">case</span> usbSET_INTERFACE_REQUEST:  
<a name="l00712"></a>00712 
<a name="l00713"></a>00713     <span class="keywordflow">default</span>:
<a name="l00714"></a>00714       prvSendStall();
<a name="l00715"></a>00715       <span class="keywordflow">break</span>;
<a name="l00716"></a>00716   }
<a name="l00717"></a>00717 }
<a name="l00718"></a>00718 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00719"></a>00719 
<a name="l00720"></a>00720 <span class="keyword">static</span> <span class="keywordtype">void</span> prvHandleStandardEndPointRequest( xUSB_REQUEST *pxRequest )
<a name="l00721"></a>00721 {
<a name="l00722"></a>00722   <span class="keywordflow">switch</span>( pxRequest-&gt;ucRequest )
<a name="l00723"></a>00723   {
<a name="l00724"></a>00724     <span class="comment">/* This minimal implementation does not expect to respond to these. */</span>
<a name="l00725"></a>00725     <span class="keywordflow">case</span> usbGET_STATUS_REQUEST:
<a name="l00726"></a>00726     <span class="keywordflow">case</span> usbCLEAR_FEATURE_REQUEST: 
<a name="l00727"></a>00727     <span class="keywordflow">case</span> usbSET_FEATURE_REQUEST:
<a name="l00728"></a>00728 
<a name="l00729"></a>00729     <span class="keywordflow">default</span>:      
<a name="l00730"></a>00730       prvSendStall();
<a name="l00731"></a>00731       <span class="keywordflow">break</span>;
<a name="l00732"></a>00732   }
<a name="l00733"></a>00733 }
<a name="l00734"></a>00734 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00735"></a>00735 
<a name="l00736"></a>00736 <span class="keyword">static</span> <span class="keywordtype">void</span> vDetachUSBInterface( <span class="keywordtype">void</span>)
<a name="l00737"></a>00737 {
<a name="l00738"></a>00738   <span class="comment">/* Setup the PIO for the USB pull up resistor. */</span>
<a name="l00739"></a>00739 
<a name="l00740"></a>00740   <span class="comment">// MakingThings: PA11, now for Pullup</span>
<a name="l00741"></a>00741   <span class="comment">/* Start without the pullup - this will get set at the end of this </span>
<a name="l00742"></a>00742 <span class="comment">  function. */</span>
<a name="l00743"></a>00743 <span class="preprocessor">  #if ( CONTROLLER_VERSION == 90 )</span>
<a name="l00744"></a>00744 <span class="preprocessor"></span>    AT91C_BASE_PIOB-&gt;PIO_PER = AT91C_PIO_PB11;
<a name="l00745"></a>00745     AT91C_BASE_PIOB-&gt;PIO_OER = AT91C_PIO_PB11;
<a name="l00746"></a>00746     AT91C_BASE_PIOB-&gt;PIO_SODR = AT91C_PIO_PB11;
<a name="l00747"></a>00747 <span class="preprocessor">  #endif</span>
<a name="l00748"></a>00748 <span class="preprocessor"></span><span class="preprocessor">  #if ( CONTROLLER_VERSION == 95 || CONTROLLER_VERSION == 100 )</span>
<a name="l00749"></a>00749 <span class="preprocessor"></span>    AT91C_BASE_PIOA-&gt;PIO_PER = AT91C_PIO_PA11;
<a name="l00750"></a>00750     AT91C_BASE_PIOA-&gt;PIO_OER = AT91C_PIO_PA11;
<a name="l00751"></a>00751     <span class="comment">/* Disable pull up */</span>
<a name="l00752"></a>00752     AT91C_BASE_PIOA-&gt;PIO_CODR = AT91C_PIO_PA11;
<a name="l00753"></a>00753 <span class="preprocessor">  #endif</span>
<a name="l00754"></a>00754 <span class="preprocessor"></span>} 
<a name="l00755"></a>00755 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00756"></a>00756 
<a name="l00757"></a>00757 <span class="keyword">static</span> <span class="keywordtype">void</span> vInitUSBInterface( <span class="keywordtype">void</span> )
<a name="l00758"></a>00758 {
<a name="l00759"></a>00759 <span class="keyword">extern</span> void ( vUSB_ISR_Wrapper )( void );
<a name="l00760"></a>00760 
<a name="l00761"></a>00761   <span class="comment">/* Create the queue used to communicate between the USB ISR and task. */</span>
<a name="l00762"></a>00762   xUSBInterruptQueue = xQueueCreate( usbQUEUE_LENGTH + 1, <span class="keyword">sizeof</span>( xISRStatus * ) );
<a name="l00763"></a>00763   
<a name="l00764"></a>00764   <span class="comment">/* Create the queues used to hold Rx and Tx characters. */</span>
<a name="l00765"></a>00765   xRxCDC = xQueueCreate( USB_CDC_QUEUE_SIZE, ( <span class="keywordtype">unsigned</span> portCHAR ) <span class="keyword">sizeof</span>(  <span class="keyword">struct</span> BulkBufferStruct ) );
<a name="l00766"></a>00766   xTxCDC = xQueueCreate( USB_CDC_QUEUE_SIZE + 1, ( <span class="keywordtype">unsigned</span> portCHAR ) <span class="keyword">sizeof</span>(  <span class="keyword">struct</span> BulkBufferStruct  ) );
<a name="l00767"></a>00767 
<a name="l00768"></a>00768   <span class="keywordflow">if</span>( (!xUSBInterruptQueue) || (!xRxCDC) || (!xTxCDC) )
<a name="l00769"></a>00769   { 
<a name="l00770"></a>00770     <span class="comment">/* Not enough RAM to create queues!. */</span>
<a name="l00771"></a>00771     <span class="keywordflow">return</span>;
<a name="l00772"></a>00772   }
<a name="l00773"></a>00773   
<a name="l00774"></a>00774   <span class="comment">/* Initialise a few state variables. */</span>
<a name="l00775"></a>00775   pxControlTx.ulNextCharIndex = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00776"></a>00776   pxControlRx.ulNextCharIndex = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00777"></a>00777   ucUSBConfig = ( <span class="keywordtype">unsigned</span> portCHAR ) 0;
<a name="l00778"></a>00778   eDriverState = eNOTHING;
<a name="l00779"></a>00779   ucControlState = 0;
<a name="l00780"></a>00780   uiCurrentBank = AT91C_UDP_RX_DATA_BK0;
<a name="l00781"></a>00781 
<a name="l00782"></a>00782 
<a name="l00783"></a>00783   <span class="comment">/* HARDWARE SETUP */</span>
<a name="l00784"></a>00784 
<a name="l00785"></a>00785   <span class="comment">/* Set the PLL USB Divider */</span>
<a name="l00786"></a>00786   AT91C_BASE_CKGR-&gt;CKGR_PLLR |= AT91C_CKGR_USBDIV_1;
<a name="l00787"></a>00787 
<a name="l00788"></a>00788   <span class="comment">/* Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock. */</span>
<a name="l00789"></a>00789   AT91C_BASE_PMC-&gt;PMC_SCER = AT91C_PMC_UDP;
<a name="l00790"></a>00790   AT91C_BASE_PMC-&gt;PMC_PCER = (1 &lt;&lt; AT91C_ID_UDP);
<a name="l00791"></a>00791 
<a name="l00792"></a>00792   <span class="comment">/* MAKINGTHINGS: ADDITION */</span>
<a name="l00793"></a>00793   <span class="comment">/* Setup the PIO for USB input */</span>
<a name="l00794"></a>00794 <span class="preprocessor">  #if ( CONTROLLER_VERSION == 90 )</span>
<a name="l00795"></a>00795 <span class="preprocessor"></span>    AT91C_BASE_PIOB-&gt;PIO_PER = AT91C_PIO_PB10;
<a name="l00796"></a>00796     AT91C_BASE_PIOB-&gt;PIO_ODR = AT91C_PIO_PB10;
<a name="l00797"></a>00797 <span class="preprocessor">  #endif</span>
<a name="l00798"></a>00798 <span class="preprocessor"></span><span class="preprocessor">  #if ( CONTROLLER_VERSION == 95 || CONTROLLER_VERSION == 100 )</span>
<a name="l00799"></a>00799 <span class="preprocessor"></span>    AT91C_BASE_PIOA-&gt;PIO_PER = AT91C_PIO_PA10;
<a name="l00800"></a>00800     AT91C_BASE_PIOA-&gt;PIO_ODR = AT91C_PIO_PA10;
<a name="l00801"></a>00801 <span class="preprocessor">  #endif</span>
<a name="l00802"></a>00802 <span class="preprocessor"></span>
<a name="l00803"></a>00803 
<a name="l00804"></a>00804   <span class="comment">/* Start without the pullup - this will get set at the end of this </span>
<a name="l00805"></a>00805 <span class="comment">  function. */</span>
<a name="l00806"></a>00806 <span class="preprocessor">  #if ( CONTROLLER_VERSION == 90 )</span>
<a name="l00807"></a>00807 <span class="preprocessor"></span>    AT91C_BASE_PIOB-&gt;PIO_PER = AT91C_PIO_PB11;
<a name="l00808"></a>00808     AT91C_BASE_PIOB-&gt;PIO_OER = AT91C_PIO_PB11;
<a name="l00809"></a>00809     AT91C_BASE_PIOB-&gt;PIO_SODR = AT91C_PIO_PB11;
<a name="l00810"></a>00810 <span class="preprocessor">  #endif</span>
<a name="l00811"></a>00811 <span class="preprocessor"></span><span class="preprocessor">  #if ( CONTROLLER_VERSION == 95 || CONTROLLER_VERSION == 100 )</span>
<a name="l00812"></a>00812 <span class="preprocessor"></span>    AT91C_BASE_PIOA-&gt;PIO_PER = AT91C_PIO_PA11;
<a name="l00813"></a>00813     AT91C_BASE_PIOA-&gt;PIO_OER = AT91C_PIO_PA11;
<a name="l00814"></a>00814     AT91C_BASE_PIOA-&gt;PIO_CODR = AT91C_PIO_PA11;
<a name="l00815"></a>00815 <span class="preprocessor">  #endif</span>
<a name="l00816"></a>00816 <span class="preprocessor"></span>
<a name="l00817"></a>00817   <span class="comment">/* When using the USB debugger the peripheral registers do not always get</span>
<a name="l00818"></a>00818 <span class="comment">  set to the correct default values.  To make sure set the relevant registers</span>
<a name="l00819"></a>00819 <span class="comment">  manually here. */</span>
<a name="l00820"></a>00820   AT91C_BASE_UDP-&gt;UDP_IDR = ( <span class="keywordtype">unsigned</span> portLONG ) 0xffffffff;
<a name="l00821"></a>00821   AT91C_BASE_UDP-&gt;UDP_ICR = ( <span class="keywordtype">unsigned</span> portLONG ) 0xffffffff;
<a name="l00822"></a>00822   AT91C_BASE_UDP-&gt;UDP_CSR[ 0 ] = ( <span class="keywordtype">unsigned</span> portLONG ) 0x00;
<a name="l00823"></a>00823   AT91C_BASE_UDP-&gt;UDP_CSR[ 1 ] = ( <span class="keywordtype">unsigned</span> portLONG ) 0x00;
<a name="l00824"></a>00824   AT91C_BASE_UDP-&gt;UDP_CSR[ 2 ] = ( <span class="keywordtype">unsigned</span> portLONG ) 0x00;
<a name="l00825"></a>00825   AT91C_BASE_UDP-&gt;UDP_CSR[ 3 ] = ( <span class="keywordtype">unsigned</span> portLONG ) 0x00;
<a name="l00826"></a>00826   AT91C_BASE_UDP-&gt;UDP_GLBSTATE = 0;
<a name="l00827"></a>00827   AT91C_BASE_UDP-&gt;UDP_FADDR = 0;
<a name="l00828"></a>00828 
<a name="l00829"></a>00829   <span class="comment">/* Enable the transceiver. */</span>
<a name="l00830"></a>00830   AT91C_UDP_TRANSCEIVER_ENABLE = 0;
<a name="l00831"></a>00831 
<a name="l00832"></a>00832   <span class="comment">/* Enable the USB interrupts - other interrupts get enabled as the </span>
<a name="l00833"></a>00833 <span class="comment">  enumeration process progresses. */</span>
<a name="l00834"></a>00834   AT91F_AIC_ConfigureIt( AT91C_ID_UDP, usbINTERRUPT_PRIORITY, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, ( <span class="keywordtype">void</span> (*)( <span class="keywordtype">void</span> ) ) vUSB_ISR_Wrapper );
<a name="l00835"></a>00835   AT91C_BASE_AIC-&gt;AIC_IECR = 0x1 &lt;&lt; AT91C_ID_UDP;
<a name="l00836"></a>00836 
<a name="l00837"></a>00837 
<a name="l00838"></a>00838   <span class="comment">/* Wait a short while before making our presence known. */</span>
<a name="l00839"></a>00839   vTaskDelay( usbINIT_DELAY );
<a name="l00840"></a>00840   
<a name="l00841"></a>00841   <span class="comment">/* MAKINGTHINGS: ADDITION */</span>
<a name="l00842"></a>00842 <span class="preprocessor">  #if ( CONTROLLER_VERSION == 90 )</span>
<a name="l00843"></a>00843 <span class="preprocessor"></span>    AT91C_BASE_PIOB-&gt;PIO_CODR = AT91C_PIO_PB11;
<a name="l00844"></a>00844 <span class="preprocessor">  #endif</span>
<a name="l00845"></a>00845 <span class="preprocessor"></span><span class="preprocessor">  #if( CONTROLLER_VERSION == 95 || CONTROLLER_VERSION == 100 )</span>
<a name="l00846"></a>00846 <span class="preprocessor"></span>    AT91C_BASE_PIOA-&gt;PIO_SODR = AT91C_PIO_PA11;
<a name="l00847"></a>00847 <span class="preprocessor">  #endif</span>
<a name="l00848"></a>00848 <span class="preprocessor"></span>}
<a name="l00849"></a>00849 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00850"></a>00850 
<a name="l00851"></a>00851 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendControlData( <span class="keywordtype">unsigned</span> portCHAR *pucData, <span class="keywordtype">unsigned</span> portSHORT usRequestedLength, <span class="keywordtype">unsigned</span> portLONG ulLengthToSend, portLONG lSendingDescriptor )
<a name="l00852"></a>00852 {
<a name="l00853"></a>00853   <span class="keywordflow">if</span>( ( ( <span class="keywordtype">unsigned</span> portLONG ) usRequestedLength &lt; ulLengthToSend ) )
<a name="l00854"></a>00854   {
<a name="l00855"></a>00855     <span class="comment">/* Cap the data length to that requested. */</span>
<a name="l00856"></a>00856     ulLengthToSend = ( <span class="keywordtype">unsigned</span> portSHORT ) usRequestedLength;
<a name="l00857"></a>00857   }
<a name="l00858"></a>00858   <span class="keywordflow">else</span> <span class="keywordflow">if</span>( ( ulLengthToSend &lt; ( <span class="keywordtype">unsigned</span> portLONG ) usRequestedLength ) &amp;&amp; lSendingDescriptor )
<a name="l00859"></a>00859   {
<a name="l00860"></a>00860     <span class="comment">/* We are sending a descriptor.  If the descriptor is an exact </span>
<a name="l00861"></a>00861 <span class="comment">    multiple of the FIFO length then it will have to be terminated</span>
<a name="l00862"></a>00862 <span class="comment">    with a NULL packet.  Set the state to indicate this if</span>
<a name="l00863"></a>00863 <span class="comment">    necessary. */</span>
<a name="l00864"></a>00864     <span class="keywordflow">if</span>( ( ulLengthToSend % usbFIFO_LENGTH ) == 0 )
<a name="l00865"></a>00865     {
<a name="l00866"></a>00866       eDriverState = eSENDING_EVEN_DESCRIPTOR;
<a name="l00867"></a>00867     }
<a name="l00868"></a>00868   }
<a name="l00869"></a>00869 
<a name="l00870"></a>00870   <span class="comment">/* Here we assume that the previous message has been sent.  THERE IS NO</span>
<a name="l00871"></a>00871 <span class="comment">  BUFFER OVERFLOW PROTECTION HERE.</span>
<a name="l00872"></a>00872 <span class="comment"></span>
<a name="l00873"></a>00873 <span class="comment">  Copy the data to send into the buffer as we cannot send it all at once</span>
<a name="l00874"></a>00874 <span class="comment">  (if it is greater than 8 bytes in length). */</span>
<a name="l00875"></a>00875   memcpy( pxControlTx.ucBuffer, pucData, ulLengthToSend );
<a name="l00876"></a>00876 
<a name="l00877"></a>00877   <span class="comment">/* Reinitialise the buffer index so we start sending from the start of </span>
<a name="l00878"></a>00878 <span class="comment">  the data. */</span>
<a name="l00879"></a>00879   pxControlTx.ulTotalDataLength = ulLengthToSend;
<a name="l00880"></a>00880   pxControlTx.ulNextCharIndex = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00881"></a>00881 
<a name="l00882"></a>00882   <span class="comment">/* Send the first 8 bytes now.  The rest will get sent in response to </span>
<a name="l00883"></a>00883 <span class="comment">  TXCOMP interrupts. */</span>
<a name="l00884"></a>00884   prvSendNextSegment();
<a name="l00885"></a>00885 }
<a name="l00886"></a>00886 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00887"></a>00887 
<a name="l00888"></a>00888 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSendNextSegment( <span class="keywordtype">void</span> )
<a name="l00889"></a>00889 {
<a name="l00890"></a>00890 <span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> portLONG ulNextLength, ulStatus, ulLengthLeftToSend;
<a name="l00891"></a>00891 
<a name="l00892"></a>00892   <span class="comment">/* Is there any data to send? */</span>
<a name="l00893"></a>00893   <span class="keywordflow">if</span>( pxControlTx.ulTotalDataLength &gt; pxControlTx.ulNextCharIndex )
<a name="l00894"></a>00894   {
<a name="l00895"></a>00895     ulLengthLeftToSend = pxControlTx.ulTotalDataLength - pxControlTx.ulNextCharIndex;
<a name="l00896"></a>00896   
<a name="l00897"></a>00897     <span class="comment">/* We can only send 8 bytes to the fifo at a time. */</span>
<a name="l00898"></a>00898     <span class="keywordflow">if</span>( ulLengthLeftToSend &gt; usbFIFO_LENGTH )
<a name="l00899"></a>00899     {
<a name="l00900"></a>00900       ulNextLength = usbFIFO_LENGTH;
<a name="l00901"></a>00901     }
<a name="l00902"></a>00902     <span class="keywordflow">else</span>
<a name="l00903"></a>00903     {
<a name="l00904"></a>00904       ulNextLength = ulLengthLeftToSend;
<a name="l00905"></a>00905     }
<a name="l00906"></a>00906 
<a name="l00907"></a>00907     <span class="comment">/* Wait until we can place data in the fifo.  THERE IS NO TIMEOUT</span>
<a name="l00908"></a>00908 <span class="comment">    HERE! */</span>
<a name="l00909"></a>00909     <span class="keywordflow">while</span>( AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ] &amp; AT91C_UDP_TXPKTRDY )
<a name="l00910"></a>00910     {
<a name="l00911"></a>00911       vTaskDelay( usbSHORTEST_DELAY );
<a name="l00912"></a>00912     }
<a name="l00913"></a>00913 
<a name="l00914"></a>00914     <span class="comment">/* Write the data to the FIFO. */</span>
<a name="l00915"></a>00915     <span class="keywordflow">while</span>( ulNextLength &gt; ( <span class="keywordtype">unsigned</span> portLONG ) 0 )
<a name="l00916"></a>00916     {
<a name="l00917"></a>00917       AT91C_BASE_UDP-&gt;UDP_FDR[ usbEND_POINT_0 ] = pxControlTx.ucBuffer[ pxControlTx.ulNextCharIndex ];
<a name="l00918"></a>00918   
<a name="l00919"></a>00919       ulNextLength--;
<a name="l00920"></a>00920       pxControlTx.ulNextCharIndex++;
<a name="l00921"></a>00921     }
<a name="l00922"></a>00922   
<a name="l00923"></a>00923     <span class="comment">/* Start the transmission. */</span>
<a name="l00924"></a>00924     portENTER_CRITICAL();
<a name="l00925"></a>00925     {
<a name="l00926"></a>00926       ulStatus = AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ];
<a name="l00927"></a>00927       usbCSR_SET_BIT( &amp;ulStatus, ( ( <span class="keywordtype">unsigned</span> portLONG ) 0x10 ) );
<a name="l00928"></a>00928       AT91C_BASE_UDP-&gt;UDP_CSR[ usbEND_POINT_0 ] = ulStatus;
<a name="l00929"></a>00929     }
<a name="l00930"></a>00930     portEXIT_CRITICAL();
<a name="l00931"></a>00931   }
<a name="l00932"></a>00932   <span class="keywordflow">else</span>
<a name="l00933"></a>00933   {
<a name="l00934"></a>00934     <span class="comment">/* There is no data to send.  If we were sending a descriptor and the </span>
<a name="l00935"></a>00935 <span class="comment">    descriptor was an exact multiple of the max packet size then we need</span>
<a name="l00936"></a>00936 <span class="comment">    to send a null to terminate the transmission. */</span>
<a name="l00937"></a>00937     <span class="keywordflow">if</span>( eDriverState == eSENDING_EVEN_DESCRIPTOR )
<a name="l00938"></a>00938     {
<a name="l00939"></a>00939       prvSendZLP();
<a name="l00940"></a>00940       eDriverState = eNOTHING;
<a name="l00941"></a>00941     }
<a name="l00942"></a>00942   }
<a name="l00943"></a>00943 }
<a name="l00944"></a>00944 
<a name="l00945"></a>00945 <span class="preprocessor">#endif // MAKE_CTRL_USB</span>
<a name="l00946"></a>00946 <span class="preprocessor"></span>
<a name="l00947"></a>00947 
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  <p class="footer">The Make Controller Kit is an open source project maintained by <a href="http://www.makingthings.com">MakingThings</a>.<br />
    MakingThings code is released under the <a href="http://www.apache.org/licenses/LICENSE-2.0.html" target="_blank">Apache 2.0 license</a>.<br />
    Bug tracker, development wiki and status can be found at <a href="http://dev.makingthings.com">http://dev.makingthings.com</a>.<br />
		This document was last updated on 5 Dec 2007.
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